just been testing new drives and psu with the memory i already had in, some early gskill micron stuff that did ok. on the dq6 gigabyte board and a b3 q6600 i could do 3.6Ghz easy, put first two sticks of ballistix pc6400 in and had no trouble running at ddr1200 at all, 5,5,5,15. around 8400mb/s sisoft bandwidth though i've read and seems likely that vista using mem so hard affects sisoft mem scores pretty massively.
i was messing around with the first pair trying to find 4,4,4,15 max speeds, and getting above 1200mhz, can boot consistantly but not make it into windows at 1350mhz, though with 2.25v, so more juice and i'm sure i could break 700mhz with the first pair. stuch the second pair in aswell and am at 550mhz 5,5,5,18 off the first boot. i'd messed around so thats just where i was at last.
bandwidth scores are limited, i could only get 1200mhz with 400mhz fsb and a higher multi, as the drop in multi means i basically can't hit 1100-1200mhz because board/cpu just will not go to 500mhz fsb. i've tried with 500mhz at 7 and 6 multi and neither seem to be able to boot at all. not sure if its board, chipset, cpu mhz limit.
you notice with higher Mhz memory and slower fsb, like 400mhz fsb and 1200mhz, i got less performance than at 450mhz bus, but only like 1050 on the memory. its because the cpu's bus is important. so the ideal is to go for the very highest fsb your cpu is capable of, then find a reasonable comprimise somewhere around that fsb limit for cpu multiplier, fsb, memory speed. so far the cpu's still completely stable at 3.6Ghz. so far its made next to no difference having the extra 2gigs in. £52 for each 2gb pack aswell. i'm happy.
